Ask HN: Looking for an animated blog showing how information spreads(?)

Hi HN, I remember some years ago stumbling across what a simple animated game showing (I think) how information spreads. I'm fairly certain it was by a female blogger who did several different similar animated games. Vague memory remembers it consisted of little blue and red figures and the red ones would infect the blue until they all changed colour. I'm sorry I can't explain it very well, it was a long time ago and my memory of it is not perfect, but I'm hoping someone migh recognise my description. I believe the author was quite highly regarded for explaining complex subjects simply and entertaingly.

Please let me know if this jogs any memories. Cheers.